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Energieffektivisering i Stigbygeln: En förstudie
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
2016 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Diös fastigheter is Northern Sweden's largest private real estate company. The bulk of the company's holdings constists of centrally located retail, industrial and office buildings, 23 of which are located in Umeå. Diös fastigheter works continuosly to decrease energy consumption in their building stock. One part of this work is to pursue the Greenbuildning environmental certification for buildings. This paper examines a building named Stigbygeln 2, situated on Dragonfältet i Umeå, currently rented by the logistics company PostNord. The energy consumption last year was approximately 290 kWh per square meter. This paper examines the reasons for the high energy consumption and which measures to increase energy-efficiency yield the largest energy-savings at the lowest cost.


At the present time Stigbygeln 2 is connected to the municipal district heating network, and distric heating is utilized as heating source to warm the inlet air of the ventilation system, which in turn warms a significant portion of the facilities found in the building. Heating of supply air constitutes 85% of the total heat load, and there is no system for heat recovery.


Stigbygeln has been constructed in the simulation tool IDA ICE in accordance with known conditions, and different measures to increase efficiency have been investigated, individually as well as combined. Through LCC analysis, savings resulting from decreased energy consumption have been weighed against the initial investment cost and the operational cost.


The result shows that a switch to FXT ventilation would yield the largest energy savings, 57%, and that this is also the financially most advantageous route. Conversion to geothermal heating reduces energy consumption by 37%, but is not economically viable. A swith to LED lighting is a measure that yields a good return on the investment cost and lowers energy consumption by 7%. The savings are greatest when a change of ventilation system is combined with a change to LED lighting.

Place, publisher, year, edition, pages
2016. , 60 p.
Keyword [sv]
Energieffektivisering, IDA ICE
National Category
Energy Engineering
URN: urn:nbn:se:umu:diva-122405OAI: diva2:938536
External cooperation
Diös fastigheter
Subject / course
Educational program
Bachelor of Science Programme in Energy Engineering
MA-121, Umeå Universitet, Umeå (Swedish)
Available from: 2016-06-17 Created: 2016-06-17 Last updated: 2016-06-17Bibliographically approved

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